The impersonal aspect [of God] (Nirakara, Nirguna) is called Brahman, or 'unknowable' by Herbert Spencer, 'will' by Schopenhauer, Absolute Noumenon by some 'substance' by Spinoza. The personal aspect (Sakara) of that Being is termed 'Ishvara' or Allah, Hari, Jehova, Father in Heaven, Buddha, Siva, etc. Just as vapour or steam is formless, so also God is formless in His unmanifested or transcendental state.
SivanandaMake others truly happy as you strive to make yourself happy. Speak a helpful word. Give a cheering smile. Do a kind act. Serve a little. Wipe the tears of one who is in distress. Render smooth a rough place in another's path. You will feel great joy.
Sivananda